Transmission screen

Abstract

A transmission screen includes a screen material having a projection light incident surface on which a Fresnel lens is formed, and a projection light outside surface on which a lenticular lens is formed. The lenticular lens has a plurality of lenticular lens portions. Formed between adjacent pairs of the lenticular lens portions are black stripes. Images of the projection light are seen on an outer surface of the lenticular lens. Furthermore, a coating having a low refraction index and a predetermined thickness is formed only on the black stripes.

What is claimed is: 
     
       1. A transmission screen comprising: a screen material having a projection light incident surface on which a Fresnel lens is formed, and a projection light outside surface on which a lenticular lens, having a plurality of lenticular lens portions, is formed, black stripes formed on said lenticular lens between adjacent pairs of lenticular lens portions, image of said projection light being seen on said projection light outside surface, wherein a coating having a low refraction index and a predetermined thickness is formed on the outside surface of the screen material, only on said black stripes.   
     
     
       2. A transmission screen according to claim 1, wherein said lenticular lens has an array of semi-cylindrical surfaces extending in a first direction and juxtaposed in a second direction perpendicular to said first direction and said semi-cylindrical surfaces form said lenticular lens portions. 
     
     
       3. A transmission screen according to claim 1, wherein said black stripes are formed on projecting parts of said projection light outside surface between adjacent lenticular lens portions. 
     
     
       4. A transmission screen comprising: a first lens on which projection light is incident;   a lenticular lens having a plurality of lenticular lens portions, said lenticular lens receiving said projection light via said first lens;   black stripes formed on an outer surface of said lenticular lens between adjacent lenticular lens portions; and   a coating formed only on each black stripe.   
     
     
       5. A transmission screen according to claim 4, wherein said first lens is a Fresnel lens. 
     
     
       6. A transmission screen according to claim 4, wherein said first lens has an outer and inner surface, and said projection light being incident on said outer surface of said first lens; and   said lenticular lens having an inner and outer surface, and said lenticular lens disposed so that said inner surface of said lenticular lens faces said inner surface of said first lens.   
     
     
       7. A transmission screen according to claim 4, wherein said lenticular lens has projection portions formed on said outer surface of said lenticular lens between adjacent lenticular lens portions; and   said black stripes are formed on said projection portions.   
     
     
       8. A transmission screen according to claim 4, wherein said lenticular lens portions form an array of semi-cylindrical surfaces extending in a first direction and juxtaposed in a second direction perpendicular to said first direction. 
     
     
       9. A transmission screen according to claim 4, wherein said coating has a low refractive index and a predetermined thickness.